The Sensitivity Experiments of Reservoir of Well Yuan-101 in Hai'an Area

The sensitivity experiments studying the flow rate sensitivity,the water sensitivity,the alkali sensitivity,the acid sensitivity and stress sensitivity of the core from Well Yuan-101 in Hai'an Area conducted for simulating reservoir conditions.The results of these experiments indicate that the critical flow rate is 1.46mg/d,the flow rate sensitive index is 0.46,it indicated the medium weak of speed sensitive damage.And the water sensitive index is 0.53,the critical mineralization is 22950mg/L for the medium strong of water sensitive damage.And the alkali sensitive index is 0.05 without alkali sensitive damage.And the acid index is 0.14 for causing medium weak of acid sensitive damage.And the ratio of permeability damage caused by stress sensitivity in less than or equal to 18MPa confining pressure is 55.35%,demonstrating stress sensitive is medium weak while the ratio of irreversible permeability damage is 13.78%.